build(deps): bump go.einride.tech/sage from 0.375.0 to 0.377.1 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.375.0 to 0.377.1.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.375.0...v0.377.1)

---
updated-dependencies:
- dependency-name: go.einride.tech/sage
  dependency-version: 0.377.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.sage/go.mod

@@ -4,4 +4,4 @@ go 1.23.0
 
 toolchain go1.24.1
 
-require go.einride.tech/sage v0.375.0
+require go.einride.tech/sage v0.377.1

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.375.0 h1:soa01Wd7ejERgVFcwidVjXkqCU2OXMifQYjI+vluvQ4=
-go.einride.tech/sage v0.375.0/go.mod h1:sy9YuK//XVwEZ2wD3f19xVSKEtN8CYtgtBZGpzC3p80=
+go.einride.tech/sage v0.377.1 h1:TrWK4JTt1uI4rUGZrS7z3rzXDuxpds1pycvEc4ZNZ7Y=
+go.einride.tech/sage v0.377.1/go.mod h1:sy9YuK//XVwEZ2wD3f19xVSKEtN8CYtgtBZGpzC3p80=